Top 1000+ Solved Strength of Materials MCQ Questions Answer
Q. A prismatic beam of length 1 and fixed at both ends carries a uniformly distributed load. Thedistance of points of contraflexure from either end is
a. 0.2071
b. 0.2111
c. 0.2771
d. 0.251
Q. A simply supported beam of length 1 carries a load varying uniformly from zero at left end to maximum at right end. The maximum bending moment occurs at a distance of
a. 1/V3 from left end
b. 1/3 from left end
c. 1/V3 from right end
d. 1/3 from right end
Q. A portion of a beam between two sections is said to be in pure bending when there is
a. constant bending moment and zero shear force
b. constant shear force and zero bending moment
c. constant bending moment and constant shear force
d. none of the above
Q. The ratio of width to depth of a strongest beam that can be cut out of a cylindrical log ofwood is
a. 1/2
b. 1/V2
c. 1/3
d. 2/3
Q. Of the several prismatic beams of equal lengths, the strongest in flexure is the one havingmaximum
a. moment of inertia
b. section modulus
c. tensile strength
d. area of cross-section
Q. A flitched beam consists of a wooden joist 150 mm wide and 300 mm deep strengthened by steel plates 10 mm thick and 300 mm deep one on either side of the joist. If modulus of elasticity of steel is 20 times that of wood, then the width of equivalent wooden section will be
a. 150 mm
b. 350 mm
c. 500 mm
d. 550 mm
Q. A beam of rectangular cross-section is 100 mm wide and 200 mm deep. If the section is subjected to a shear force of 20 kN, then the maximum shear stress in the section is
a. 1 N/mm2
b. 1.125 N/mm2
c. 1.33 N/mm2
d. 1.5 N/mm2
Q. A beam of square cross-section with side 100 mm is placed with one diagonal vertical. If the shear force acting on the section is 10 kN, the maximum shear stress is
a. 1 N/mm2
b. 1.125 N/mm2
c. 2 N/mm2
d. 2.25 N/mm2
Q. A prismatic bar when subjected to pure bending assumes the shape of
a. catenary
b. cubic parabola
c. quadratic parabola
d. arc of a circle
Q. A beam of triangular cross section is placed with its base horizontal. The maximum shear stress intensity in the section will be
a. at the neutral axis
b. at the base
c. above the neutral axis
d. below the neutral axis
Q. A beam of uniform strength has at every cross-section same
a. bending moment
b. bending stress
c. deflection
d. stiffness
Q. For no torsion, the plane of bending should
a. be parallel to one of the principal axes
b. pass through shear centre of section
c. pass through neutral axis of the section
d. pass through centre of gravity of the section
Q. Two beams, one of circular cross-section and other of square cross-section, have equal areasof cross-section. If subjected to bending
a. circular section is more economical
b. square section is more economical
c. both sections are equally strong
d. both sections are equally stiff
Q. The portion, which should be removed from top and bottom of a circular cross section ofdiameter d in order to obtain maximum section modulus, is
a. 0.01 d
b. 0.1 d
c. 0.011 d
d. 0.11 d